Carbon deposition eliminator for vehicle exhaust pipe

ABSTRACT

A carbon deposition eliminator for installation in the exhaust pipe of a motor vehicle to guide exhaust gas through the exhaust pipe and to eliminate deposition of carbon in the inside wall of the exhaust pipe is disclosed to have a tubular body, which defines a gas input port at one end and a tapered inside wall gradually reducing from the gas input port toward the other end of the tubular body for accelerating the flowing speed of exhaust gas, and a tubular neck, which defines an exhaust port at one end remote from the tubular body and a straight inside wall connected between the narrowest end of the tapered inside wall and the exhaust port.

BACKGROUND OF THE INVENTION

1. Field of the Invention

The present invention relates to vehicle exhaust pipes and more specifically, to a carbon deposition eliminator for use in a vehicle exhaust pipe.

2. Description of the Related Art

The exhaust pipe of a motor vehicle is a tubular member mounted with a muffler. During the operation of the motor vehicle, the exhaust pipe discharges the engine waste gas to the atmosphere, and muffler reduces the exhaust noises. The installation of the muffler in the exhaust pipe affects smooth flowing of exhaust gas, i.e., the muffler reduces the flowing speed of exhaust gas, causing waste carbon to be deposited in the inside wall of the exhaust pipe easily. Deposition of waste carbon in the inside wall of the exhaust pipe affects exhaust of waste gas through the exhaust pipe, resulting in low performance of the engine.

SUMMARY OF THE INVENTION

The present invention has been accomplished under the circumstances in view.

According to one aspect of the present invention, the carbon deposition eliminator has a tapered inside wall for accelerating the flowing speed of exhaust gas, preventing deposition of exhaust carbon in the inside wall of the exhaust pipe. According to another aspect of the present invention, the carbon deposition eliminator has a tubular front neck for guiding out the accelerated flow of exhaust gas, preventing interference of side flow of turbulent air with the accelerated flow of exhaust gas.

BRIEF DESCRIPTION OF THE DRAWINGS

FIG. 1 is a sectional elevation of a carbon deposition eliminator in accordance with the present invention.

FIG. 2 is a schematic sectional view of the present invention, showing the carbon deposition eliminator in action.

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENT

Referring to FIG. 1, a carbon deposition eliminator in accordance with the present invention is shown comprising a tubular body 10, a tubular neck 101 axially extending from one end of the tubular body 10, a gas input port 11 defined in the tubular body 10, an exhaust port 12 defined in the tubular neck 101. The tubular body 10 has a tapered inner diameter 13 gradually reducing from the gas input port 11 toward the exhaust port 12. The tubular neck 101 has an inner diameter 14 extending from the narrowest end of the tapered inner diameter 13 of the tubular body 10 to the exhaust port 12. The inner diameter 14 of the tubular neck 101 is equal to the diameter of the exhaust port 12. Further, the wall thickness of the tubular neck 101 is smaller than the wall thickness of the tubular body 10. The outer wall 15 of the tubular neck 101 is curved smoothly and downwardly forwards from the periphery of the tubular body 10 to the periphery of the exhaust port 12.

Referring to FIG. 2, the carbon deposition eliminator is installed in the exhaust pipe 1 of a motor vehicle. When exhaust gas H enters the gas input port 11 of the tubular body 10 of the carbon deposition eliminator, it is compressed by the tapered inner diameter 13 of the tubular body 10, and therefore the flowing speed of exhaust gas H is accelerated, and the accelerated flow of exhaust gas LH is then guided by the straight inner diameter 14 of the tubular neck 101 to the outside of the carbon deposition eliminator through the exhaust port 12.

Because the carbon deposition eliminator greatly accelerates the flowing speed of exhaust gas, carbon powder in the accelerated exhaust gas will not deposit in the inside wall of the exhaust pipe 1 easily.

Further, when the accelerated flow of exhaust gas LH flows out of the exhaust port 12 to the inside of the tailpiece of the exhaust pipe 1, turbulent flows of air H1 are produced around the outer wall 15 of the tubular neck 101 without affecting the flowing of the accelerated flow of exhaust gas LH, i.e., the tubular neck 101 guides the accelerated flow of exhaust gas LH to flow out of the carbon deposition eliminator toward the rear side of the exhaust pipe 1. Therefore, the invention effectively eliminates deposition of carbon in the inside wall of the exhaust pipe 1.

Although a particular embodiment of the invention has been described in detail for purposes of illustration, various modifications and enhancements may be made without departing from the spirit and scope of the invention. 

1. A carbon deposition eliminator for installation in the exhaust pipe of a motor vehicle to guide exhaust gas through said exhaust pipe and to eliminate deposition of carbon in the inside wall of said exhaust pipe, the carbon deposition eliminator comprising a tubular body peripherally fastened to the inside wall of said exhaust pipe, a tubular neck axially forwardly extending from a front side of said tubular body and suspending inside said exhaust pipe and spaced from the inside wall of said exhaust pipe, a gas input port defined in one end of said tubular body remote from said tubular neck, an exhaust port defined in one end of said tubular neck remote from said tubular body, a tapered inside wall portion defined in said tubular body and extending from said gas input port toward said exhaust port, said tapered inside wall portion having a diameter gradually reducing in direction from said gas input port toward said exhaust port, and a straight inside wall portion defined in said tubular neck and extending from said tapered inside wall portion to said exhaust port.
 2. The carbon deposition eliminator as claimed in claim 1, wherein said tubular neck has an outer wall curved smoothly and downwardly forwards from the periphery of said tubular body to the periphery of said exhaust port. 